{"product_id":"bridgestone-21-inch-tr-4-heavy-duty-inner-tube-with-center-metal-valve-543500","title":"Bridgestone 21-Inch TR-4 Heavy-Duty Inner Tube with Center Metal Valve 543500","description":"Inner Tube - Heavy Duty - 21\" - TR-4 - Center Metal Valve\n\u003cp\u003eThe Bridgestone TR-4 Heavy-Duty Inner Tube is designed for dependable performance in 21-inch street and off-road tire applications. Built for riders who need a durable replacement tube, this inner tube helps support consistent air retention and reliable operation across a wide range of riding conditions. Its heavy-duty construction provides added resistance to common wear encountered during everyday road use, trail riding, and mixed-surface travel.\u003cbr\u003eThe Bridgestone 543500 inner tube features a TR-4 valve design with a center-mounted metal valve stem. The metal valve construction offers a secure, serviceable connection for inflation and pressure checks, while the centered placement supports compatibility with appropriate wheel and tire configurations. Always confirm that the tube size, valve position, and valve type match the wheel and tire before installation.\u003cbr\u003eManufactured by Bridgestone, this replacement tube is intended for use with compatible 21-inch tires and is suitable for both street and off-road motorcycles or powersports applications. The manufacturer part number is 543500, and the vendor part number is also 543500, making identification straightforward when ordering a replacement or maintaining an existing tire service inventory. For best results, inspect the tire and rim for debris, sharp edges, or damage before installation, and use proper tire mounting procedures to help prevent pinching or premature failure. The Bridgestone TR-4 Heavy-Duty Inner Tube delivers a practical replacement solution when durability, valve reliability, and trusted brand quality are important.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eTire Size: Designed for compatible 21-inch street and off-road tire applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTire Model: TR-4 inner tube with a center-mounted valve configuration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTire Brand: Bridgestone replacement tube\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eConstruction: Heavy-duty design for enhanced durability in demanding riding conditions\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eValve Type: Center metal valve for dependable inflation and pressure servicing\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Suitable for compatible motorcycle and powersports tires used on roads or off-road terrain\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eManufacturer Part Number: 543500\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eVendor Part Number: 543500\u003c\/li\u003e\u003c\/ul\u003e","brand":"BRIDGESTONE","offers":[{"title":"Default Title","offer_id":49388125749483,"sku":"03500102","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/104647.png?v=1789020912","url":"https:\/\/ctracingservices.com\/products\/bridgestone-21-inch-tr-4-heavy-duty-inner-tube-with-center-metal-valve-543500","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}